1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
|
/* Query, remove, or restore a Solaris privilege.
Copyright (C) 2009-2021 Free Software Foundation, Inc.
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <https://www.gnu.org/licenses/>.
Written by David Bartley. */
#include <config.h>
#define PRIV_SET_INLINE _GL_EXTERN_INLINE
#include "priv-set.h"
#if HAVE_GETPPRIV && HAVE_PRIV_H
# include <errno.h>
# include <stdbool.h>
# include <priv.h>
/* Holds a (cached) copy of the effective set. */
static priv_set_t *eff_set;
/* Holds a set of privileges that we have removed. */
static priv_set_t *rem_set;
static bool initialized;
static int
priv_set_initialize (void)
{
if (! initialized)
{
eff_set = priv_allocset ();
if (!eff_set)
{
return -1;
}
rem_set = priv_allocset ();
if (!rem_set)
{
priv_freeset (eff_set);
return -1;
}
if (getppriv (PRIV_EFFECTIVE, eff_set) != 0)
{
priv_freeset (eff_set);
priv_freeset (rem_set);
return -1;
}
priv_emptyset (rem_set);
initialized = true;
}
return 0;
}
/* Check if priv is in the effective set.
Returns 1 if priv is a member and 0 if not.
Returns -1 on error with errno set appropriately. */
int
priv_set_ismember (const char *priv)
{
if (! initialized && priv_set_initialize () != 0)
return -1;
return priv_ismember (eff_set, priv);
}
/* Try to remove priv from the effective set.
Returns 0 if priv was removed.
Returns -1 on error with errno set appropriately. */
int
priv_set_remove (const char *priv)
{
if (! initialized && priv_set_initialize () != 0)
return -1;
if (priv_ismember (eff_set, priv))
{
/* priv_addset/priv_delset can only fail if priv is invalid, which is
checked above by the priv_ismember call. */
priv_delset (eff_set, priv);
if (setppriv (PRIV_SET, PRIV_EFFECTIVE, eff_set) != 0)
{
priv_addset (eff_set, priv);
return -1;
}
priv_addset (rem_set, priv);
}
else
{
errno = EINVAL;
return -1;
}
return 0;
}
/* Try to restore priv to the effective set.
Returns 0 if priv was re-added to the effective set (after being previously
removed by a call to priv_set_remove).
Returns -1 on error with errno set appropriately. */
int
priv_set_restore (const char *priv)
{
if (! initialized && priv_set_initialize () != 0)
return -1;
if (priv_ismember (rem_set, priv))
{
/* priv_addset/priv_delset can only fail if priv is invalid, which is
checked above by the priv_ismember call. */
priv_addset (eff_set, priv);
if (setppriv (PRIV_SET, PRIV_EFFECTIVE, eff_set) != 0)
{
priv_delset (eff_set, priv);
return -1;
}
priv_delset (rem_set, priv);
}
else
{
errno = EINVAL;
return -1;
}
return 0;
}
#endif
|
